Some background info on the engine might help figure what it means. Do you know what type of vehicle the engine is from. Is the number a casting number made when the block was cast or a number hand stamped onto the block for id purposes.
Hi guys here are some other numbers (casting number) C6AE-6015-C.
from what I can workout its manufactured in 66 and came from a full size ford,which could be anything! And the crank has C3AE-N stamped on it.